Weishaupt Short Cycling / Oversized Output

Water heater frequently cycles on and off rapidly while hot water is being used.

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Minimum burner output too high, Restricted flow causing quick temperature rise, Faulty temperature sensor placement, Incorrect parameter settings

Safety: Avoid frequent resets; identify the cause of short cycling.

Increase flow: Open the hot tap further to increase flow and see if cycling reduces.
Clean plate heat exchanger: Scale can cause rapid temperature rise. Have the Weishaupt plate heat exchanger descaled.
Check sensors: Ensure DHW and flow sensors are correctly attached and reading accurately.
Parameter adjustment: A technician can adjust minimum burner power or anti-cycling parameters within Weishaupt service menus if available.

Medium 3/5

Plate Heat Exchanger

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